TY - JOUR
T1 - Synthesis of plait-like carbon nanocoils in ultrahigh yield, and their microwave absorption properties
AU - Tang, Nujiang
AU - Yang, Yi
AU - Lin, Kuanjiuh
AU - Zhong, Wei
AU - Au, Chaktong
AU - Du, Youwei
N1 - This work was financially supported by the Jiangsu Natural Science Foundation for Young Innovator (BK2007522), the National Natural Science Foundation (50602023), the National Major Project of Fundamental Research: Nanomaterials and Nanostructures (2005CB623605), P. R. China, and the National Science Council of Taiwan (NSC96-2627-M005-001).
PY - 2008/7/10
Y1 - 2008/7/10
N2 - Over Ni nanoparticles generated by means of a combined sol-gel/reduction method, crystalline plait-like carbon nanocoils (CNCs) were synthesized in acetylene pyrolysis at 415°C. The field-emission scanning electron microscope (FE-SEM) and high-resolution transmission electron microscope (HR-TEM) images reveal that there are often two CNCs in opposite handedness fused in one nanoplait. By optimization of reaction parameters, maximum purities and yields of plait-like CNCs and single CNCs were 99.35 wt % and 99.53 wt %, and ca. 18759.8% and 21269.6%, respectively. The pyrolysis of acetylene was carried out at 415°C, and no dilute gas such as argon and nitrogen was needed. Thus, we have provided a simple, low-cost, and environmentally friendly approach for the mass production of CNCs with ultrahigh purity. The microwave absorption properties of the as-prepared plait-like CNCs and single CNCs were examined systematically. The results demonstrated that the as-prepared plait-like CNCs exhibit good microwave absorbing ability. The effects of the temperatures for acetylene pyrolysis and for NiO powder reduction in the CNCs synthesis on the morphology, yield, and microwave absorption properties of carbon products were also investigated.
AB - Over Ni nanoparticles generated by means of a combined sol-gel/reduction method, crystalline plait-like carbon nanocoils (CNCs) were synthesized in acetylene pyrolysis at 415°C. The field-emission scanning electron microscope (FE-SEM) and high-resolution transmission electron microscope (HR-TEM) images reveal that there are often two CNCs in opposite handedness fused in one nanoplait. By optimization of reaction parameters, maximum purities and yields of plait-like CNCs and single CNCs were 99.35 wt % and 99.53 wt %, and ca. 18759.8% and 21269.6%, respectively. The pyrolysis of acetylene was carried out at 415°C, and no dilute gas such as argon and nitrogen was needed. Thus, we have provided a simple, low-cost, and environmentally friendly approach for the mass production of CNCs with ultrahigh purity. The microwave absorption properties of the as-prepared plait-like CNCs and single CNCs were examined systematically. The results demonstrated that the as-prepared plait-like CNCs exhibit good microwave absorbing ability. The effects of the temperatures for acetylene pyrolysis and for NiO powder reduction in the CNCs synthesis on the morphology, yield, and microwave absorption properties of carbon products were also investigated.
UR - http://www.scopus.com/inward/record.url?scp=49249105922&partnerID=8YFLogxK
U2 - 10.1021/jp8017293
DO - 10.1021/jp8017293
M3 - Journal article
AN - SCOPUS:49249105922
SN - 1932-7447
VL - 112
SP - 10061
EP - 10067
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 27
ER -